<template>
	<div>
		<h1>学校：{{ school }}，课程：{{ subject }}</h1>
		<h1>当前求和为：{{ sum }}</h1>
		<h2>放大10倍后的值：{{ bigSum}}</h2>
		<select v-model.number="n">
			<option value="1">1</option>
			<option value="2">2</option>
			<option value="3">3</option>
		</select>
		<h3>Person组件的总人数为：{{ personList.length }}</h3>
		<button @click="increment(n)">+</button>
		<button @click="decrement(n)">-</button>
		<button @click="incrementOdd(n)">当前求和为奇数再加</button>
		<button @click="incrementWait(n)">等一等再加</button>
	</div>
</template>

<script>
	// 引入mapState
	import { mapState,mapGetters,mapMutations,mapActions} from 'vuex';
	export default {
		name:'Count',
		data() {
			return {n:1}
		},
		computed:{
			// 借助mapState生成计算属性，从state中读取数据。(数组写法)
			...mapState(['sum','school','subject','personList']),
			// 借助mapGetters生成计算属性，从getters中读取数据。
			...mapGetters(['bigSum'])
		},
		methods: {
			// 借助mapMutations生成对应的方法，方法中会调用commit去联系mutations
			...mapMutations({increment:'ADD',decrement:'SUB'}),
			// 借助mapActions生成对应的方法，方法中会调用dispatch去联系actions
			...mapActions({incrementOdd:'addOdd',incrementWait:'addWait'})
		},
	}
</script>

<style lang="css">
	button{
		margin-left: 5px;
	}
</style>
